Hi all, I am currently working with the ioexpander/gpio driver to control GPIO pins from an application. I am wondering if anybody is using this interface for more practical applications than toggling a pin from the command line (i.e. apps/examples/gpio). I would say the interface is simple but effective. It can read and set pin values and pintypes can be changed. That's all I need.
However, I am wondering about the naming of the devices. Pins are registered as /dev/gpinN, /dev/gpoutN, or /dev/gpintN (where N is a integer number, of course) depending on their pintype. Now, there is a SETPINTYPE command, which you can use to change pintypes. So that means an output pin initially registered as /dev/gpout0 could be changed to be an input pin, with it keeping the same name. Wouldn't it make more sense to register ALL pins as generic /dev/gpioN instead of the specific /dev/gpinN, /dev/gpoutN, /dev/gpintN? Maybe there's a good reason to keep these distinct names, but it is also really confusing when pin types start to change. Best regards, Jari van Ewijk
